Value of Ancient Copper Water Heater?

I have an old copper water heater, probably from the 1930s, sitting in my basement in the house I just bought. It is not in use. I am planning on selling it for scrap. I don't want to get ripped-off. How much should I get? Help me not be a sucker! It is 5 feet by 1 foot.

It varies daily, but it's around $2/pound around here. Somewhat depends on how clean. An old waterheater could be full of mineral deposits. Might pay to cut it open, clean it out and take off any non-copper parts. Depends on how much your time is worth, too.

Is that thing at all functional? Some people will pay absolutely astonishing prices for crummy old plumbing fixtures. My town has entire stores that
specialize in the sort of junk I've been tossing in the dumpster for decades!